Locking device for speed-governors of talking-machines.



C." E. WOODS.

LOCKING DEVICE FOR SPEED GOVERNORS 0F TALKING MACHINES.

APPLICATION FILED MAR- 5, 1914.

1 ,1 86,638. Patented June 13, 1916.

. THE COLUMBIA PLANOGRAPH 00., WASHINGTON, D. c-

, means, in the a which adjustment is CLINTON E. WOODS, 0F BRIDGEPORT, CONNECTICUT, ASSIGNOR TO AMERICAN GBAPHO- PHONE COMPANY, OF BRIDGEPORT, CONNECTICUT, A CORPORATION OF WEST VIRGINIA.

LOCKING DEVICE FOR SPEED-GOVERNORS OF TALKING-MACHINES.

To all whom it may concern Be it known that I, CLINTON E. Woons, of Bridgeport, Connecticut, have invented a new and useful Improvement in Looking Devices for Speed-Governors of Talking- Machines in the following specification.

This invention relates to speed governors for talking machines, and more particularly to means for locking the adjusting mechanism of such speed governors in any given adjusted position, to the end that when the machine has been adjusted to the desired speed, it may not be inadvertently or accidentally disturbed.

In talking machines, in order to secure the best results either in recording or reproducing, it is desirable that the record tablet should be driven at approximately a predetermined speed, and for this purpose form of a speed governor, are provided for controlling the speed of the motor, which governing mechanism is adjusted through an element or elements for varying the position of the friction pads which cooperate with the friction disk of the speed governor. In certain classes of machines such, for example, as those used for office dictating purposes, it is desirable that the speed at which the record is driven in reproducing should be the same, or approximately the same, as the speed at which the record was driven in dictating. And it is a common practice to adjust the speeds of the dictating machine and the reproducing 'machine' so that they are approximately the same. This adjustment having been secured, it is desirable that it should be maintained against disturbance. In the present invention, this object is secured by providing means for locking the element through obtained against accidental displacement, and until the locking device is manipulated to free the adjusting element. 1

The invention will .be best understood from the detailed description and drawings thereof.

The inventive idea may receive a variety of mechanical expressions, one of which is shown in such drawings and specifically described herein, but such drawings and dewhich invention is fully set'forth Specification of Letters Patent. Paj lgntgd June 13, 1916, Application filed March 5, 1914. Serial No. 822,687.

scription are for the purpose of enabling the invention to be understood, and I are not 'meant to define the limits thereof, reference being had to the appended claims for this purpose.

In said drawings-Figure 1 is a top plan view showing a portion of the bed-plate of the machine; Fig. 2 is an elevation of Fig. 1 looking from the right; Fig. 3 is an elevation of Fig. 2 looking from the left; and Fig. l is a detailed perspective.

Referring to the said drawings, in which like reference numerals indicate like parts throughout the several views, 1 is a speed governor of any suitable or desired construction, and 2 is the friction disk thereof, in operative relation with friction pads 3 carried on a fork I suspended from a lever 5 fulcrumed at 6 to an ear 7, depending from the bed-plate 8 of the talking machine. The lever 5 is normally held in its elevated position by a spring 9 and in operative engagement with an element for depressing the lever 5, and thereby throwing the pads 3 toward the friction disk 2. As herein shown, this element is in the form of a gradually increasing cam 10, mounted on a shaft 11.

turning in suitable bearings depending from the bed-plate 8 of the machine. On the end of the shaft 11 is a toothed or serrated wheel 12, of such diameter that it projects through an opening or slot 18 formed in the bed-plate 8, so that the serrated edge of the wheel 12 projects slightly above the surface of the bed-plate, as will be readily understood from an inspection of Fig. 3. This serrated wheel is technically known in the art as the speed knob, and the operator of the machine, by turning this wheel, increases or decreases the action of the cam lO upon the lever 5, and thus varies the relation of the friction pads 3 with the disk 2.

A pin or rod 14 is mounted in a tubular socket or hearing 15 depending from the bed-plate 8, and is surrounded by a spring 16 reacting against a shoulder 17 on the pin and the bottom ofthe socket 15, and tending normally to hold the pin 14% with its upper end projecting above the surface of 18 rigidly secured thereto and pro ecting under the speed knob 12, and carrying at its end a tooth 19 (Fig. 4) for engaging the teethor serrations on the speed knob 12. Preferably, the arm 18 is forked, as shown in Fig. 4, the tines or'arms20 ofythe fork straddling the speed knob, and with the 1 tooth 19 between them.

14 against teeth or serrationson the speed knob 12, and

then revolves the speed knob, and with it the cam' 10, until the desired speedis secured.

He then removes pressure from the pin 14, and the spring 16 elevates the same, and with it the arm 18, bringing the tooth 19 thereon; intoengagement with the speed knob, and

locklng 1t against accidental displacement;

If desired, the relations between the tooth V 19 on the arm 18 and the teeth or serrations on the speed knob 12 may be such that the which means may be readily ed toproject upward speed knob may be adjusted without manipulation of the pin 14, but only by the exercise of sufficient power to overcome the tension of the spring 16; In eitherevent, the speed knob is held against accidental displacement, and the objects of the invention are secured. 7 Various modifications of the specific construction herein shown may bemade, with,- outdeparting from the spirit of the invention, thefessentia'lfeature of which is the provision of meansfor locking'the adjusting mechanism against accidental displacement, manipulated by the operator for releasing the adjusting mechanism when it isdesired to vary the speed-of the record tablet.

What is claimed is V i 1. In a talking machine, the combination of a horizontal motor-board having a slot therein, a speed governor, controlling means for the'governor comprising a vertical adjusting wheel mounted to project upward through thesaid slot to permit manual adjustment thereof, and means below the n10- tor-board for yieldably engaging the wheel 7 to hold it in adjusted position.

2. In a talking machine, the combination of a horizontal motor-board rhaving a .slot therein, a speed governor, controlling means for the governor comprising a verticaladjusting wheel mounted to project upward through the said slot to permit manual adjustment thereof, and manually operable means for engaging the wheel below the motor-board for engaging the wheel to hold 'itin adjusted position.

3. In a talking machine, the combination 'ofa motor-board having a slot therein'and having an aperture adjacent the slot, a speed governor, controlling means for the governor comprising an adjusting wheelimountthroughthe said'slot,

means below the motor-board for engaging the wheel to hold it in adjusted position, and a manually operable device projecting upward through the aperture and connected with theholding means to bring the latter into and out of operation. I V

4. In a talking machine, the combination of a motor-board-having a slottherein and havinganaperture adjacent the slot, a speed governor, controlling means for the governor comprising an adjusting wheel mounted'to project upward through the said slot, 7

means below the motor-board for engaging.

the wheel to hold it in adjusted position, a manually operable pin projecting upward through the aperture and connected with the holding means, and a spring for moving the pin upward and to bring the holding means into operative position. 5, 'In a talking machine, the, combination of a horizontal motor-board having a slot therein,

a speed governor, controlling means for the governor comprising a vertical adjusting'wheel serrated along its entire circumference and mounted to project upward through the said slot to permit manual adjustment thereof, and toothed means below the motor-board for engaging the serrations of the wheel to hold it in'adju'sted position. -.6; Ina talking machine, the combination of a speed governor, controlling means for the governor'comprising an adjusting wheel serrated along its entire circumference and having its serrations exposed at one side for manual engagement, and toothed means for engaging the serrations of the wheel at a I point remote from the gagement to hold the sition. V i V 7. In a talking machine, the combination wheel in adjusted P0- of a speed governor, means for controlling place of manual enthe governor comprising a serrated wheel, a V

rectilinearly movable pin wvheel, a tooth carried by the pin and adapted for normally engaging said toothed wheel when the Wheel is in any of several positions of adjustment, and a springtending to hold the pin andthe tooth in the position in which the latter engages the wheelf of a speed governor, means for controlling 8. In atalking machine, the combination,

adjacent the V the governor comprising a serrated wheel, a l

rectilinearly movable pin adjacent the wheel, a finger connected to thepinand extend-1 ing at an-angle thereto, a tooth at theend of the'finger adaptedfor normally engaging said toothed wheel when of several positions of adjustment, and a spring-tending to hold the pin, thefinger and the tooth in: the position in latter engages the wheel.

9; i of a speed governor, means for controlling the governor comprising a serrated-wheel, a rectilinearly movable pin adjacent the which the thewheel is in any 7 In a talking machine, the combination Wheel, a finger connected to the pin and extending at an angle thereto, a tooth at the end of the finger adapted for normally engaging said toothed wheel when the wheel is in any of several positions of adjustment, tines at the end of the finger extending on opposite sides of the wheel to prevent lateral movement of the finger, and a spring tending to hold the pin, the finger and the tooth in the position in which the latter engages 10 (Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

